Press



our. 2.3;1923.' 1,471,608

C.. IRWIN ET AL 5 EHESS Filed Feb. 1s l1922 2 sheets-sheet 2 l//aW//lff/////////////////////"HWI/fl A #fa/*megs Patente @et 23,. 123.. y Li,

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CLIFTON W. IRWIN, 0E LOS ANGELES, AND NICHOLAS V. D. BROCK, OF SANTA ANA,

CALIFORNIA; SAID IRWIN ASSIGNOR TO SAID BROCK.

PRESS.

Application led February 13, 1922. Serial No. 536,039.

To all whom t may concern: The hub 13 of the table 10 projects into 55 Be it known that we, CLIFTON V. IRWIN, the lower chamber 14 of a stuiing box 15' a citizen of the United States, residing at which is also rovided with an upper cham- Los Angeles, in the county of Los Angeles ber 16 closed liy'a gland 17. The chambers and State of California, and NICHOLAS V. 14, 16 are provided with packing 18 and D. BROCK, a citizen of the United States, said packing is suitably compressed by bolts 60 residing at Santa Ana, in the county ofv 19 which connect the gland 17 with the table Orange and State of California, have inand whichv are also screw-threaded Vented a new and useful Press, of wh-ich through a flange 2O of the stuiiing box 15, 10 the following is a specification. so that the gland can be forced into the This invention relates to au apparatus of chamber 16 and the stuiiing box can be 65 the character employed in die casting such forced toward the hub 13. articles, forexample, as glass door knobs, The stuiling box is providedl between and an `important object of the invention the chambers 14, 16 with a Huid chamber 21 15 is to increase the output of the individual which communicates with one end of a duct molds. 22 formed in the shaft9. The other end of 70 Another object is to provide an auto-p the duct 22 terminates at the lower end of matically cooled pin in each of the molds the shaft 9 and communicates with a tube so that the speed of operation can be in- 23 adapted to be connected to any suitable 2o creased compressed airsupply.

Another object is to effect the production The upper end of the shaft 9 is engaged 75 of knobs and other objects in a split or secbya bearing 24 of a cross head 25. On the tional mold without a seam showing on the opposite ends of the cross head 25 are jourouter end of the knob. A `naled the upper ends of connecting rods 26:? 25 The accompanying drawings illustrate the The lower ends of the connecting rods 26 are ,y invention; connected to crank arms 27 secured to a rock B0" Figure 1 is a side elevation, partly in sec shaft 28 which is journaled in bearings 29 tion of an apparatus built 'in accordance secured to the underface of the support 6. with the provisions of this invention, the Any suitable means ,may be provided for 30 stuffing box,'table bearing and thrust bear-A rocking the ,shaft 28 and,`A in this instance,

ing being shown in section and the supportsaid shaft 1s provided for this purpose 55 in' legs being partly brokenaway. withV a lever arm 30 adapted tobe manually ig. 2 is a plan view partly in section on operated. U the irregular line indicated by 2 2, Fig. 1, The cross head 25 is provided with a seca corner of the support being broken away. ond bearing 31 adapted to slide on a stand- Fig. 3 is an enlargedplanview'of one of ard 32. Thus. when the lever arm 30 is 90 the molds, the parts thereof being in the operated the crosshead 25 is caused to slide closed position." j on the shaft 9 and standard 32.'

Fig. 4.is asectional elevation on the line Adjustably connected by nuts 33 to the indicated by 4-4,' Fig. `3, a fragment of the cross Y head 25 between the shaft 9 and rotary table alsobeing shown. f standard 32 is a plunger stem 34 which is 95 Fig.'5 is a fragmental sectional elevation screw-threaded through a second cross head on the line indicated by` 5 5, Figure 4. 35. The cross head 35 is provided at its op- There is provided asupport 6 mounted on posite ends with bearings 36, 37, which slidlegs 7, which are but fragmentarily shown ably engage the shaft 9 and standard 32, in Fig. 1 of the drawings. l Rotatively respectively. Adjustably connected with 100 mounted-on the support 6 by an anti-friction the `stem 34 by nuts 38 is a flange 39 prothrust bearing 8 and a vertical stationary vided with counter-sunk holes 40 to laccomshaft 9 is a rotary table 10. The shaft 9 is modate the head ends of headed guide studs 50 provided with a shoulder 11 which seats 41 which are mounted on a plunger 42. The

'upon the support 6, and the shaft projects heads 43 of the studs .41 are largerv than the 105 through the support and is provided there; least diameter of the holes 40 so as to limit beneath with a nut 12t0 securely anchor the Amovement of the, flange 39 away from the lower end of the shaft in the-support. plunger 42. .0n the studs 41 between the flange 39 and plunger 42 are coil springs 44 which yieldingly hold the plunger 42 jagainst upward movement. The operation of the cross head 24, inthe manner described above, produces operation of the plunger 42.

lVhen the plunger 42 descends, it enters the pouring recess 45 `in a split mold 46. In the instance shown in the drawings there are four such molds mounted on the table 10 and they are alike and therefore but one will be described. y

,Below the recess 45 of the mold 46 areV the molding cavities 47. These cavities 47, of course, may be' of any desired number and shape and, in the instanceshown in the s/ drawlngs said cavities are shaped to form holes.

door kno s. The cavities 47 communicate withthe recess through holes48. The bottom of the cavities 47 is independentof the mold sections 49, in whichthe cavities are formed, and said bottom comprises a perforate memlfer 50. The perforations are indicated at 51 and said perforations are preferably provided with bushings 52. The

bottom member is yieldingly mounted on' coil springs 53 which surround guide posts 54 mounted in a base 55 that in turn is secured byany suitable means, not shown, upon the table 10. The posts 54 pass through counter-sunk holes 56 in the member 5() and areM provided with heads 57 of larger diameter than the least diameter of said The -heads 57 serve to limit movement of the member 50 away from the base `producedby expansion of the springs 53.

-' Mounted in and projecting above the up per face of the base 55 are pins 58 tapered, las indicated at 59, and having their upper ends normally positioned within the bushings '52 when the member 50 and the fparts mountedthereonare in the upper position;

.indicated in 'Figure 4.-

, Adjacent each of the .base ends of the pins 58 isa duct 60 havingbranches 61 and formed f The branches 61 are di- Y fluid will be suppliedgtothe duct branches 61.

i molds, and all of the tubes 6 Since there are four molds 46, there are provided four tubes 63, one for each of the 3 communicates with the air chamber 21.

Suitable moans are provided forlocking the mold sections 49 in closed positionv and, inthis instance, a detachable eccentric key 64 of well known construction in this art is employed for this purpose, said key en- 1,471,eos I gaging/holes 65, 66,. in one of the mold members/and a hole 67 in the other mold member,fand all of said holes being in axial alinement when the sections are in closed position. The mold sections 49 are hingedly connected by a pin 68, which is mounted'in and projects above the member 50.

For the purpose of describing the opera tion of the invention, it may be assumed that glass door lknobs are to be cast in the molds 46. One of the molds will be brought to position to receive molten glass in a manner well understood in this art. The table -10 will then be turned manually or otherwise to bring the next succeeding mold in I ably immediately before the molds pass to position beneath the plunger 42.

The lever 30 is then operated to lower the plunger 42 into the recess'45 of the mold that has been filled and moved to position beneath the plunger. The plunger compacts the molten glass 69 and, as it de scends further, forces the mold 46 downwardly against the expansive force of the springs 53 to cause the pins 59 to penetrate the molten glass 69. The penetration of the pins 58 into the molten glass is limited by abutments 70 on the base 55 engaging the member 50 when the mold 46 descends. It will be readily understood that the molten glass heats .the pins 59 and that the fluid flowing from the duct 60 is vfor lthe purpose of cooling the pins. Heretofore the pins have been cooled by causing air to blow on them through the mold cavities after the knobs or other product of the molds have been discharged therefrom. It, of course,

requires a certain length of time to effect the cooling sufiiciently to prevent too greatk heating and consequent softening of the pins1 that otherwise would result by the repeated exposure of the pins to the molten glass vat too close intervals, and thus b the old method a large part of the cyce of operation, during which the knobs ywere withdrawn from the, pins and discharged from nthe mold, passed without the cooling jet being in action. It will be seen by this construction that the air or other cooling fluid blows upon the lower portions of the pins continuously and that as soon as the mold rises sufficiently to cause the knobs to be withdrawn `slightly from the pins, as indicated in Fig. 5, because of the taper of the pins a passage will be created between the pins and the cast knobs4 so that the cooling 'fluid can blow upwardly into the recesses 71 produced by the pins and eii'ect immediate cooling of the upper portions of the pins. The cooling Jets blow upon the upper portions of the pins at all times during the operation of the machine excepting when the molten glass is forced downwardly lll around the pins. Thus quicker cooling -of the pins is effected than by the old method above described since cooling jets are directed upon the pin during Ithe relative motion between the pins and mold of this machine. The air injected into the recesses 7l in the knobs left by the pins 59 also aids in cooling the knobs, thus causing them to contract so that they will free themselves trom the mold as soon as the mold is opened.

We claim':

l. In a press, a mold having a molding cavity and having a perforation com municating with the cavity through the bottom of the cavity, a pin in alinement f with the perforation, means to produce relative movement betweenthe pin and mold sections to cause the pin to project *into the cavity, and meansadjacent the pin to direct a cooling jet upon the pin during the relative motion between the pin and mold.

2. In a press, a rotatably mounted table, molds mounted on the table and provided with cavities and with perforations communicating-with the cavities, pins mounted on the table in axial alinement with the perforations and extending upwards to cooperate with the molds, means to produce relative movement between the pins and molds, and means to direct cooling jets upon the pins while the table is rotating.

Signed at Los Angeles, California this 4th day of February 1922.

CLIFTON W.OIRWIN. NICHOLAS V. D. BROCK. Witnesses:

GEORGE H. HILEs, L. BELLE WEAVER. 

